But there's one thing they could never have predicted: their audience.

"That's one of our favorite things about our global audience: you're as unpredictable as you are creative and irreverent," the YouTube Team wrote.

YouTube recruited the Gregory Brothers to recap the site's history in order to mark the occasion, and they captured the overwhelming sensation of what it would be like to discover YouTube for the first time.

YouTube trends manager Kevin Allocca curated a list of what he felt were the funniest videos on YouTube of all-time to mark both YouTube's birthday and Comedy Week.

Forget the Google Initiative, the paid subscriptions, or the comedic talents being featured this week. The real humor is actually in the older, homemade videos that influenced and made us love YouTube in the first place.